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RVSM approval allows aircraft to fly with a vertical separation of 1000 feet reduced from 2000 feet between FL290 and FL410 inclusive.

The Air Navigation Order & Regulations states that a UK registered aircraft "shall not fly in reduced vertical separation minimum airspace... unless it is equipped with height keeping systems which enable the aircraft to maintain the prescribed height keeping performance
capability".

Declaration of RVSM Capability for Certificate of Airworthiness Issue, Subsequent Issue or Renewal

Additional considerations

RVSM approval is non-transferable between operators, a new application must be submitted if the operator of an aircraft changes.

The CAA is required by the International Civil Aviation Organization (ICAO) to maintain a database of all RVSM approved UK registered aircraft. Operators are therefore required to inform the CAA Flight Operations Policy Department in the event of an RVSM approved aircraft being added to or removed from their fleet.